Beauty is pain!
The reality star posted a Snap of her legs after the event, and they looked like an annoyed cat had gone on the attack.
The I Knew You Were Trouble songstress posed for pictures outside The Late Show with David Letterman looking like a blonde Audrey Hepburn in a tight black shirt, skinny pants and kitten heels.
If Gap ever decides they want to remake The Skinny Black Pant ad, they know who to call!
[Image via HRC/WENN.]